1. Population Health Sciences, Bristol Medical School, University of Bristol; NIHR CLAHRC West at University Hospitals Bristol NHS Foundation Trust; Lewins Mead, Whitefriars Building Bristol UK BS1 2NT
2. University of Bristol; Population Health Sciences, Bristol Medical School; Canynge Hall Bristol UK BS8 2PS
3. University of Bristol; School of Social and Community Medicine; 39 Whatley Road Bristol UK BS8 2PS
4. UCL; UCL Division of Psychiatry; 67-73 Riding House St London UK W1W 7EJ